The fracture properties of five types of chocolate (dark, extra dark, milk, white, and ruby) were investigated using an indirect tensile test known as the Brazilian test. Two different loading rates of 0.0017 m/s and around 12 m/s were used through the universal testing machine TIRATEST and split Hopkinson pressure bar (SHPB) technique. Results show that the tensile fracture stress increases with the loading rate. The sensitivity of the fracture stress at low-loading rates is lower than that at the high-loading rates. The obtained results can be used in industry for the correct processing of chocolate products and their transport. The presented methods can be also used to detect defects in chocolate products.

Department of Food Technology Mendel University in Brno Brno Czech Republic

Department of Technology and Automobile Transport Mendel University in Brno Brno Czech Republic

Institute of Thermomechanics Czech Academy of Science Prague Czech Republic

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